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In the given set of materials, the reading passage and the lecture deal with the bason to debate whether their numbers plummeted with the European colonization of North America for a variety of reasons, the most important being hunting and habitat change. The reading passage is providing three pieces of evidence to prove its point, whereas the lecturer argues against it by providing three compelling rebuttals.
The reading passage asserts the idea that the first reason for the sharp decline in their numbers was overhunting. While the Native Americans took bison in large numbers, they only thinned the herds, taking only what they could use. The large scale of this early fur business had a large impact on bison numbers.
The professor casts doubt because __________(¸®½º´× Àüü)___________________
The reading claims the second way in which the Europeans decimated the wild buffalo herds was through the use of modern weapons. The bison were unable to escape these accurate, longer-range weapons, which dramatically lowered the number of wild bison on the American plains.
The professor refutes the idea because ________(¸®½º´× Àüü)____________
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The reading points out that The professor challenges the idea because _____(¸®½º´× Àüü)______
In the given set of materials, the reading passage and the lecture deal with Edmontosaurus to debate how they survived the extremely cold winters of Alaska and Northwestern Canada, where their fossils have been found. The reading passage is providing three pieces of evidence to prove its point, whereas the lecturer argues against it by providing three compelling rebuttals.
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The reading passage asserts the idea that they were plant-eaters, so they likely migrated with the changing of the seasons in order to find grass. They probably roamed the Alaskan and Canadian areas in the warmer spring and summer months, and then migrated southward for the colder autumn and winter months for food.
The professor casts doubt because __________(¸®½º´× Àüü)___________________
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The reading claims that it is thought that they lived in herd-like groups, similar to modern migrating animals, like the caribou due to the fact that numerous skeletal remains were found in a concentrated area. Animals that live in these types of groups are generally migratory, not only because of weather changes, but also because concentrated numbers of animals tend to strip their environments of resources and they must move elsewhere for food.
The professor refutes the idea because ________(¸®½º´× Àüü)____________
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The reading points out that their ability to stand on their hind legs and run would have allowed them to migrate more easily. This would have enabled them to very efficiently move their herds from the colder north into the warmer southern areas.
The professor challenges the idea because _____(¸®½º´× Àüü)______
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